Caffeine Ingestion Increases Estimated Glycolytic Metabolism during Taekwondo Combat Simulation but Does Not Improve Performance or Parasympathetic Reactivation
The aim of this study was to evaluate the effect of caffeine ingestion on performance and estimated energy system contribution during simulated taekwondo combat and on post-exercise parasympathetic reactivation. Ten taekwondo athletes completed two experimental sessions separated by at least 48 hour...
Gespeichert in:
| Veröffentlicht in: | PloS one 2015-11, Vol.10 (11), p.e0142078-e0142078 |
|---|---|
| Hauptverfasser: | , , , , , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | e0142078 |
|---|---|
| container_issue | 11 |
| container_start_page | e0142078 |
| container_title | PloS one |
| container_volume | 10 |
| creator | Lopes-Silva, João Paulo Silva Santos, Jonatas Ferreira da Branco, Braulio Henrique Magnani Abad, César Cavinato Cal Oliveira, Luana Farias de Loturco, Irineu Franchini, Emerson |
| description | The aim of this study was to evaluate the effect of caffeine ingestion on performance and estimated energy system contribution during simulated taekwondo combat and on post-exercise parasympathetic reactivation.
Ten taekwondo athletes completed two experimental sessions separated by at least 48 hours. Athletes consumed a capsule containing either caffeine (5 mg∙kg-1) or placebo (cellulose) one hour before the combat simulation (3 rounds of 2 min separated by 1 min passive recovery), in a double-blind, randomized, repeated-measures crossover design. All simulated combat was filmed to quantify the time spent fighting in each round. Lactate concentration and rating of perceived exertion were measured before and after each round, while heart rate (HR) and the estimated contribution of the oxidative (WAER), ATP-PCr (WPCR), and glycolytic (W[La-]) systems were calculated during the combat simulation. Furthermore, parasympathetic reactivation after the combat simulation was evaluated through 1) taking absolute difference between the final HR observed at the end of third round and the HR recorded 60-s after (HRR60s), 2) taking the time constant of HR decay obtained by fitting the 6-min post-exercise HRR into a first-order exponential decay curve (HRRτ), or by 3) analyzing the first 30-s via logarithmic regression analysis (T30).
Caffeine ingestion increased estimated glycolytic energy contribution in relation to placebo (12.5 ± 1.7 kJ and 8.9 ± 1.2 kJ, P = 0.04). However, caffeine did not improve performance as measured by attack number (CAF: 26. 7 ± 1.9; PLA: 27.3 ± 2.1, P = 0.48) or attack time (CAF: 33.8 ± 1.9 s; PLA: 36.6 ± 4.5 s, P = 0.58). Similarly, RPE (CAF: 11.7 ± 0.4 a.u.; PLA: 11.5 ± 0.3 a.u., P = 0.62), HR (CAF: 170 ± 3.5 bpm; PLA: 174.2 bpm, P = 0.12), oxidative (CAF: 109.3 ± 4.5 kJ; PLA: 107.9 kJ, P = 0.61) and ATP-PCr energy contributions (CAF: 45.3 ± 3.4 kJ; PLA: 46.8 ± 3.6 kJ, P = 0.72) during the combat simulation were unaffected. Furthermore, T30 (CAF: 869.1 ± 323.2 s; PLA: 735.5 ± 232.2 s, P = 0.58), HRR60s (CAF: 34 ± 8 bpm; PLA: 38 ± 9 bpm, P = 0.44), HRRτ (CAF: 182.9 ± 40.5 s, PLA: 160.3 ± 62.2 s, P = 0.23) and HRRamp (CAF: 70.2 ± 17.4 bpm; PLA: 79.2 ± 17.4 bpm, P = 0.16) were not affected by caffeine ingestion.
Caffeine ingestion increased the estimated glycolytic contribution during taekwondo combat simulation, but this did not result in any changes in performance, perceived exertion or parasympathetic reactivation. |
| doi_str_mv | 10.1371/journal.pone.0142078 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_plos_</sourceid><recordid>TN_cdi_plos_journals_1730683387</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><doaj_id>oai_doaj_org_article_1446a3dfdfb343b09d8586155bb73d73</doaj_id><sourcerecordid>3858341411</sourcerecordid><originalsourceid>FETCH-LOGICAL-c526t-2b11400c6d10ab1904b605bc18f8e659754b9089abecca3f7b39da6854ef16423</originalsourceid><addsrcrecordid>eNptkttu1DAQhiMEogd4AwSWuOFmFzs-xLlBqpZSVipQQbm2xs5km8WJFzvZat-GRyV7aNUirjyy__nm4D_LXjE6Zbxg75dhiB346Sp0OKVM5LTQT7JjVvJ8onLKnz6Ij7KTlJaUSq6Vep4d5UrystT5cfZnBnWNTYdk3i0w9U3oxshFhISJnI8XLfRYkQu_ccFv-saRL9iDDb5JLamG2HQLcg346zZ0VSCz0FroyY-mHTzsYHboyccwsr6GnszbVQxrJFcY6xBb6BySEMkVREibdgX9DW4rfEdwfbPeAV5kz2rwCV8eztPs56fz69nnyeW3i_ns7HLiZK76SW4ZE5Q6VTEKlpVUWEWldUzXGpUsCylsSXUJFp0DXheWlxUoLQXWTImcn2Zv9tyVD8kclpsMKzhVmnNdjIr5XlEFWJpVHDcTNyZAY3YXIS4MxLF9j4YJoYBXdVVbLrilZaWlVkxKawteFXxkfThUG2yLlcOuj-AfQR-_dM2NWYS1EYqLQsoR8O4AiOH3MH6caZvk0HvoMAy7vlmhecHLUfr2H-n_pxN7lYshpYj1fTOMmq3h7rLM1nDmYLgx7fXDQe6T7hzG_wIxsNfI</addsrcrecordid><sourcetype>Open Website</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>1730683387</pqid></control><display><type>article</type><title>Caffeine Ingestion Increases Estimated Glycolytic Metabolism during Taekwondo Combat Simulation but Does Not Improve Performance or Parasympathetic Reactivation</title><source>MEDLINE</source><source>DOAJ Directory of Open Access Journals</source><source>Public Library of Science (PLoS) Journals Open Access</source><source>EZB-FREE-00999 freely available EZB journals</source><source>PubMed Central</source><source>Free Full-Text Journals in Chemistry</source><creator>Lopes-Silva, João Paulo ; Silva Santos, Jonatas Ferreira da ; Branco, Braulio Henrique Magnani ; Abad, César Cavinato Cal ; Oliveira, Luana Farias de ; Loturco, Irineu ; Franchini, Emerson</creator><contributor>Eynon, Nir</contributor><creatorcontrib>Lopes-Silva, João Paulo ; Silva Santos, Jonatas Ferreira da ; Branco, Braulio Henrique Magnani ; Abad, César Cavinato Cal ; Oliveira, Luana Farias de ; Loturco, Irineu ; Franchini, Emerson ; Eynon, Nir</creatorcontrib><description>The aim of this study was to evaluate the effect of caffeine ingestion on performance and estimated energy system contribution during simulated taekwondo combat and on post-exercise parasympathetic reactivation.
Ten taekwondo athletes completed two experimental sessions separated by at least 48 hours. Athletes consumed a capsule containing either caffeine (5 mg∙kg-1) or placebo (cellulose) one hour before the combat simulation (3 rounds of 2 min separated by 1 min passive recovery), in a double-blind, randomized, repeated-measures crossover design. All simulated combat was filmed to quantify the time spent fighting in each round. Lactate concentration and rating of perceived exertion were measured before and after each round, while heart rate (HR) and the estimated contribution of the oxidative (WAER), ATP-PCr (WPCR), and glycolytic (W[La-]) systems were calculated during the combat simulation. Furthermore, parasympathetic reactivation after the combat simulation was evaluated through 1) taking absolute difference between the final HR observed at the end of third round and the HR recorded 60-s after (HRR60s), 2) taking the time constant of HR decay obtained by fitting the 6-min post-exercise HRR into a first-order exponential decay curve (HRRτ), or by 3) analyzing the first 30-s via logarithmic regression analysis (T30).
Caffeine ingestion increased estimated glycolytic energy contribution in relation to placebo (12.5 ± 1.7 kJ and 8.9 ± 1.2 kJ, P = 0.04). However, caffeine did not improve performance as measured by attack number (CAF: 26. 7 ± 1.9; PLA: 27.3 ± 2.1, P = 0.48) or attack time (CAF: 33.8 ± 1.9 s; PLA: 36.6 ± 4.5 s, P = 0.58). Similarly, RPE (CAF: 11.7 ± 0.4 a.u.; PLA: 11.5 ± 0.3 a.u., P = 0.62), HR (CAF: 170 ± 3.5 bpm; PLA: 174.2 bpm, P = 0.12), oxidative (CAF: 109.3 ± 4.5 kJ; PLA: 107.9 kJ, P = 0.61) and ATP-PCr energy contributions (CAF: 45.3 ± 3.4 kJ; PLA: 46.8 ± 3.6 kJ, P = 0.72) during the combat simulation were unaffected. Furthermore, T30 (CAF: 869.1 ± 323.2 s; PLA: 735.5 ± 232.2 s, P = 0.58), HRR60s (CAF: 34 ± 8 bpm; PLA: 38 ± 9 bpm, P = 0.44), HRRτ (CAF: 182.9 ± 40.5 s, PLA: 160.3 ± 62.2 s, P = 0.23) and HRRamp (CAF: 70.2 ± 17.4 bpm; PLA: 79.2 ± 17.4 bpm, P = 0.16) were not affected by caffeine ingestion.
Caffeine ingestion increased the estimated glycolytic contribution during taekwondo combat simulation, but this did not result in any changes in performance, perceived exertion or parasympathetic reactivation.</description><identifier>ISSN: 1932-6203</identifier><identifier>EISSN: 1932-6203</identifier><identifier>DOI: 10.1371/journal.pone.0142078</identifier><identifier>PMID: 26539982</identifier><language>eng</language><publisher>United States: Public Library of Science</publisher><subject>Activation ; Adult ; Athletes ; Athletic Performance - physiology ; ATP ; Caffeine ; Caffeine - pharmacology ; Cellulose ; Cross-Over Studies ; Decay ; Double-Blind Method ; Energy ; Exercise ; Exercise - physiology ; Exercise Test - drug effects ; Glycolysis ; Glycolysis - drug effects ; Glycolysis - physiology ; Heart rate ; Heart Rate - drug effects ; Heart Rate - physiology ; Humans ; Ingestion ; Lactic acid ; Lactic Acid - metabolism ; Male ; Martial arts ; Martial Arts - physiology ; Metabolism ; Metabolites ; Oxygen Consumption - drug effects ; Oxygen Consumption - physiology ; Parasympathetic nervous system ; Parasympathetic Nervous System - drug effects ; Parasympathetic Nervous System - physiology ; Physical education ; Physical training ; Physiology ; Regression analysis ; Simulation ; Time constant ; Young Adult</subject><ispartof>PloS one, 2015-11, Vol.10 (11), p.e0142078-e0142078</ispartof><rights>2015 Lopes-Silva et al. This is an open access article distributed under the terms of the Creative Commons Attribution License: http://creativecommons.org/licenses/by/4.0/ (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><rights>2015 Lopes-Silva et al 2015 Lopes-Silva et al</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c526t-2b11400c6d10ab1904b605bc18f8e659754b9089abecca3f7b39da6854ef16423</citedby><cites>FETCH-LOGICAL-c526t-2b11400c6d10ab1904b605bc18f8e659754b9089abecca3f7b39da6854ef16423</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC4634755/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC4634755/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,314,727,780,784,864,885,2102,2928,23866,27924,27925,53791,53793,79600,79601</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/26539982$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><contributor>Eynon, Nir</contributor><creatorcontrib>Lopes-Silva, João Paulo</creatorcontrib><creatorcontrib>Silva Santos, Jonatas Ferreira da</creatorcontrib><creatorcontrib>Branco, Braulio Henrique Magnani</creatorcontrib><creatorcontrib>Abad, César Cavinato Cal</creatorcontrib><creatorcontrib>Oliveira, Luana Farias de</creatorcontrib><creatorcontrib>Loturco, Irineu</creatorcontrib><creatorcontrib>Franchini, Emerson</creatorcontrib><title>Caffeine Ingestion Increases Estimated Glycolytic Metabolism during Taekwondo Combat Simulation but Does Not Improve Performance or Parasympathetic Reactivation</title><title>PloS one</title><addtitle>PLoS One</addtitle><description>The aim of this study was to evaluate the effect of caffeine ingestion on performance and estimated energy system contribution during simulated taekwondo combat and on post-exercise parasympathetic reactivation.
Ten taekwondo athletes completed two experimental sessions separated by at least 48 hours. Athletes consumed a capsule containing either caffeine (5 mg∙kg-1) or placebo (cellulose) one hour before the combat simulation (3 rounds of 2 min separated by 1 min passive recovery), in a double-blind, randomized, repeated-measures crossover design. All simulated combat was filmed to quantify the time spent fighting in each round. Lactate concentration and rating of perceived exertion were measured before and after each round, while heart rate (HR) and the estimated contribution of the oxidative (WAER), ATP-PCr (WPCR), and glycolytic (W[La-]) systems were calculated during the combat simulation. Furthermore, parasympathetic reactivation after the combat simulation was evaluated through 1) taking absolute difference between the final HR observed at the end of third round and the HR recorded 60-s after (HRR60s), 2) taking the time constant of HR decay obtained by fitting the 6-min post-exercise HRR into a first-order exponential decay curve (HRRτ), or by 3) analyzing the first 30-s via logarithmic regression analysis (T30).
Caffeine ingestion increased estimated glycolytic energy contribution in relation to placebo (12.5 ± 1.7 kJ and 8.9 ± 1.2 kJ, P = 0.04). However, caffeine did not improve performance as measured by attack number (CAF: 26. 7 ± 1.9; PLA: 27.3 ± 2.1, P = 0.48) or attack time (CAF: 33.8 ± 1.9 s; PLA: 36.6 ± 4.5 s, P = 0.58). Similarly, RPE (CAF: 11.7 ± 0.4 a.u.; PLA: 11.5 ± 0.3 a.u., P = 0.62), HR (CAF: 170 ± 3.5 bpm; PLA: 174.2 bpm, P = 0.12), oxidative (CAF: 109.3 ± 4.5 kJ; PLA: 107.9 kJ, P = 0.61) and ATP-PCr energy contributions (CAF: 45.3 ± 3.4 kJ; PLA: 46.8 ± 3.6 kJ, P = 0.72) during the combat simulation were unaffected. Furthermore, T30 (CAF: 869.1 ± 323.2 s; PLA: 735.5 ± 232.2 s, P = 0.58), HRR60s (CAF: 34 ± 8 bpm; PLA: 38 ± 9 bpm, P = 0.44), HRRτ (CAF: 182.9 ± 40.5 s, PLA: 160.3 ± 62.2 s, P = 0.23) and HRRamp (CAF: 70.2 ± 17.4 bpm; PLA: 79.2 ± 17.4 bpm, P = 0.16) were not affected by caffeine ingestion.
Caffeine ingestion increased the estimated glycolytic contribution during taekwondo combat simulation, but this did not result in any changes in performance, perceived exertion or parasympathetic reactivation.</description><subject>Activation</subject><subject>Adult</subject><subject>Athletes</subject><subject>Athletic Performance - physiology</subject><subject>ATP</subject><subject>Caffeine</subject><subject>Caffeine - pharmacology</subject><subject>Cellulose</subject><subject>Cross-Over Studies</subject><subject>Decay</subject><subject>Double-Blind Method</subject><subject>Energy</subject><subject>Exercise</subject><subject>Exercise - physiology</subject><subject>Exercise Test - drug effects</subject><subject>Glycolysis</subject><subject>Glycolysis - drug effects</subject><subject>Glycolysis - physiology</subject><subject>Heart rate</subject><subject>Heart Rate - drug effects</subject><subject>Heart Rate - physiology</subject><subject>Humans</subject><subject>Ingestion</subject><subject>Lactic acid</subject><subject>Lactic Acid - metabolism</subject><subject>Male</subject><subject>Martial arts</subject><subject>Martial Arts - physiology</subject><subject>Metabolism</subject><subject>Metabolites</subject><subject>Oxygen Consumption - drug effects</subject><subject>Oxygen Consumption - physiology</subject><subject>Parasympathetic nervous system</subject><subject>Parasympathetic Nervous System - drug effects</subject><subject>Parasympathetic Nervous System - physiology</subject><subject>Physical education</subject><subject>Physical training</subject><subject>Physiology</subject><subject>Regression analysis</subject><subject>Simulation</subject><subject>Time constant</subject><subject>Young Adult</subject><issn>1932-6203</issn><issn>1932-6203</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><sourceid>DOA</sourceid><recordid>eNptkttu1DAQhiMEogd4AwSWuOFmFzs-xLlBqpZSVipQQbm2xs5km8WJFzvZat-GRyV7aNUirjyy__nm4D_LXjE6Zbxg75dhiB346Sp0OKVM5LTQT7JjVvJ8onLKnz6Ij7KTlJaUSq6Vep4d5UrystT5cfZnBnWNTYdk3i0w9U3oxshFhISJnI8XLfRYkQu_ccFv-saRL9iDDb5JLamG2HQLcg346zZ0VSCz0FroyY-mHTzsYHboyccwsr6GnszbVQxrJFcY6xBb6BySEMkVREibdgX9DW4rfEdwfbPeAV5kz2rwCV8eztPs56fz69nnyeW3i_ns7HLiZK76SW4ZE5Q6VTEKlpVUWEWldUzXGpUsCylsSXUJFp0DXheWlxUoLQXWTImcn2Zv9tyVD8kclpsMKzhVmnNdjIr5XlEFWJpVHDcTNyZAY3YXIS4MxLF9j4YJoYBXdVVbLrilZaWlVkxKawteFXxkfThUG2yLlcOuj-AfQR-_dM2NWYS1EYqLQsoR8O4AiOH3MH6caZvk0HvoMAy7vlmhecHLUfr2H-n_pxN7lYshpYj1fTOMmq3h7rLM1nDmYLgx7fXDQe6T7hzG_wIxsNfI</recordid><startdate>20151105</startdate><enddate>20151105</enddate><creator>Lopes-Silva, João Paulo</creator><creator>Silva Santos, Jonatas Ferreira da</creator><creator>Branco, Braulio Henrique Magnani</creator><creator>Abad, César Cavinato Cal</creator><creator>Oliveira, Luana Farias de</creator><creator>Loturco, Irineu</creator><creator>Franchini, Emerson</creator><general>Public Library of Science</general><general>Public Library of Science (PLoS)</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7QG</scope><scope>7QL</scope><scope>7QO</scope><scope>7RV</scope><scope>7SN</scope><scope>7SS</scope><scope>7T5</scope><scope>7TG</scope><scope>7TM</scope><scope>7U9</scope><scope>7X2</scope><scope>7X7</scope><scope>7XB</scope><scope>88E</scope><scope>8AO</scope><scope>8C1</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>8FH</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>ATCPS</scope><scope>AZQEC</scope><scope>BBNVY</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>C1K</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>FR3</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>GNUQQ</scope><scope>H94</scope><scope>HCIFZ</scope><scope>K9.</scope><scope>KB.</scope><scope>KB0</scope><scope>KL.</scope><scope>L6V</scope><scope>LK8</scope><scope>M0K</scope><scope>M0S</scope><scope>M1P</scope><scope>M7N</scope><scope>M7P</scope><scope>M7S</scope><scope>NAPCQ</scope><scope>P5Z</scope><scope>P62</scope><scope>P64</scope><scope>PATMY</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>PYCSY</scope><scope>RC3</scope><scope>7X8</scope><scope>5PM</scope><scope>DOA</scope></search><sort><creationdate>20151105</creationdate><title>Caffeine Ingestion Increases Estimated Glycolytic Metabolism during Taekwondo Combat Simulation but Does Not Improve Performance or Parasympathetic Reactivation</title><author>Lopes-Silva, João Paulo ; Silva Santos, Jonatas Ferreira da ; Branco, Braulio Henrique Magnani ; Abad, César Cavinato Cal ; Oliveira, Luana Farias de ; Loturco, Irineu ; Franchini, Emerson</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c526t-2b11400c6d10ab1904b605bc18f8e659754b9089abecca3f7b39da6854ef16423</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Activation</topic><topic>Adult</topic><topic>Athletes</topic><topic>Athletic Performance - physiology</topic><topic>ATP</topic><topic>Caffeine</topic><topic>Caffeine - pharmacology</topic><topic>Cellulose</topic><topic>Cross-Over Studies</topic><topic>Decay</topic><topic>Double-Blind Method</topic><topic>Energy</topic><topic>Exercise</topic><topic>Exercise - physiology</topic><topic>Exercise Test - drug effects</topic><topic>Glycolysis</topic><topic>Glycolysis - drug effects</topic><topic>Glycolysis - physiology</topic><topic>Heart rate</topic><topic>Heart Rate - drug effects</topic><topic>Heart Rate - physiology</topic><topic>Humans</topic><topic>Ingestion</topic><topic>Lactic acid</topic><topic>Lactic Acid - metabolism</topic><topic>Male</topic><topic>Martial arts</topic><topic>Martial Arts - physiology</topic><topic>Metabolism</topic><topic>Metabolites</topic><topic>Oxygen Consumption - drug effects</topic><topic>Oxygen Consumption - physiology</topic><topic>Parasympathetic nervous system</topic><topic>Parasympathetic Nervous System - drug effects</topic><topic>Parasympathetic Nervous System - physiology</topic><topic>Physical education</topic><topic>Physical training</topic><topic>Physiology</topic><topic>Regression analysis</topic><topic>Simulation</topic><topic>Time constant</topic><topic>Young Adult</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Lopes-Silva, João Paulo</creatorcontrib><creatorcontrib>Silva Santos, Jonatas Ferreira da</creatorcontrib><creatorcontrib>Branco, Braulio Henrique Magnani</creatorcontrib><creatorcontrib>Abad, César Cavinato Cal</creatorcontrib><creatorcontrib>Oliveira, Luana Farias de</creatorcontrib><creatorcontrib>Loturco, Irineu</creatorcontrib><creatorcontrib>Franchini, Emerson</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Animal Behavior Abstracts</collection><collection>Bacteriology Abstracts (Microbiology B)</collection><collection>Biotechnology Research Abstracts</collection><collection>Nursing & Allied Health Database</collection><collection>Ecology Abstracts</collection><collection>Entomology Abstracts (Full archive)</collection><collection>Immunology Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Nucleic Acids Abstracts</collection><collection>Virology and AIDS Abstracts</collection><collection>Agricultural Science Collection</collection><collection>Health & Medical Collection</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Medical Database (Alumni Edition)</collection><collection>ProQuest Pharma Collection</collection><collection>Public Health Database</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>ProQuest Natural Science Collection</collection><collection>Hospital Premium Collection</collection><collection>Hospital Premium Collection (Alumni Edition)</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>Advanced Technologies & Aerospace Collection</collection><collection>Agricultural & Environmental Science Collection</collection><collection>ProQuest Central Essentials</collection><collection>Biological Science Collection</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>Natural Science Collection</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ProQuest One Community College</collection><collection>ProQuest Materials Science Collection</collection><collection>ProQuest Central Korea</collection><collection>Engineering Research Database</collection><collection>Health Research Premium Collection</collection><collection>Health Research Premium Collection (Alumni)</collection><collection>ProQuest Central Student</collection><collection>AIDS and Cancer Research Abstracts</collection><collection>SciTech Premium Collection</collection><collection>ProQuest Health & Medical Complete (Alumni)</collection><collection>Materials Science Database</collection><collection>Nursing & Allied Health Database (Alumni Edition)</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>ProQuest Engineering Collection</collection><collection>ProQuest Biological Science Collection</collection><collection>Agricultural Science Database</collection><collection>Health & Medical Collection (Alumni Edition)</collection><collection>Medical Database</collection><collection>Algology Mycology and Protozoology Abstracts (Microbiology C)</collection><collection>Biological Science Database</collection><collection>Engineering Database</collection><collection>Nursing & Allied Health Premium</collection><collection>Advanced Technologies & Aerospace Database</collection><collection>ProQuest Advanced Technologies & Aerospace Collection</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>Environmental Science Database</collection><collection>Materials Science Collection</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>Engineering Collection</collection><collection>Environmental Science Collection</collection><collection>Genetics Abstracts</collection><collection>MEDLINE - Academic</collection><collection>PubMed Central (Full Participant titles)</collection><collection>DOAJ Directory of Open Access Journals</collection><jtitle>PloS one</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Lopes-Silva, João Paulo</au><au>Silva Santos, Jonatas Ferreira da</au><au>Branco, Braulio Henrique Magnani</au><au>Abad, César Cavinato Cal</au><au>Oliveira, Luana Farias de</au><au>Loturco, Irineu</au><au>Franchini, Emerson</au><au>Eynon, Nir</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Caffeine Ingestion Increases Estimated Glycolytic Metabolism during Taekwondo Combat Simulation but Does Not Improve Performance or Parasympathetic Reactivation</atitle><jtitle>PloS one</jtitle><addtitle>PLoS One</addtitle><date>2015-11-05</date><risdate>2015</risdate><volume>10</volume><issue>11</issue><spage>e0142078</spage><epage>e0142078</epage><pages>e0142078-e0142078</pages><issn>1932-6203</issn><eissn>1932-6203</eissn><abstract>The aim of this study was to evaluate the effect of caffeine ingestion on performance and estimated energy system contribution during simulated taekwondo combat and on post-exercise parasympathetic reactivation.
Ten taekwondo athletes completed two experimental sessions separated by at least 48 hours. Athletes consumed a capsule containing either caffeine (5 mg∙kg-1) or placebo (cellulose) one hour before the combat simulation (3 rounds of 2 min separated by 1 min passive recovery), in a double-blind, randomized, repeated-measures crossover design. All simulated combat was filmed to quantify the time spent fighting in each round. Lactate concentration and rating of perceived exertion were measured before and after each round, while heart rate (HR) and the estimated contribution of the oxidative (WAER), ATP-PCr (WPCR), and glycolytic (W[La-]) systems were calculated during the combat simulation. Furthermore, parasympathetic reactivation after the combat simulation was evaluated through 1) taking absolute difference between the final HR observed at the end of third round and the HR recorded 60-s after (HRR60s), 2) taking the time constant of HR decay obtained by fitting the 6-min post-exercise HRR into a first-order exponential decay curve (HRRτ), or by 3) analyzing the first 30-s via logarithmic regression analysis (T30).
Caffeine ingestion increased estimated glycolytic energy contribution in relation to placebo (12.5 ± 1.7 kJ and 8.9 ± 1.2 kJ, P = 0.04). However, caffeine did not improve performance as measured by attack number (CAF: 26. 7 ± 1.9; PLA: 27.3 ± 2.1, P = 0.48) or attack time (CAF: 33.8 ± 1.9 s; PLA: 36.6 ± 4.5 s, P = 0.58). Similarly, RPE (CAF: 11.7 ± 0.4 a.u.; PLA: 11.5 ± 0.3 a.u., P = 0.62), HR (CAF: 170 ± 3.5 bpm; PLA: 174.2 bpm, P = 0.12), oxidative (CAF: 109.3 ± 4.5 kJ; PLA: 107.9 kJ, P = 0.61) and ATP-PCr energy contributions (CAF: 45.3 ± 3.4 kJ; PLA: 46.8 ± 3.6 kJ, P = 0.72) during the combat simulation were unaffected. Furthermore, T30 (CAF: 869.1 ± 323.2 s; PLA: 735.5 ± 232.2 s, P = 0.58), HRR60s (CAF: 34 ± 8 bpm; PLA: 38 ± 9 bpm, P = 0.44), HRRτ (CAF: 182.9 ± 40.5 s, PLA: 160.3 ± 62.2 s, P = 0.23) and HRRamp (CAF: 70.2 ± 17.4 bpm; PLA: 79.2 ± 17.4 bpm, P = 0.16) were not affected by caffeine ingestion.
Caffeine ingestion increased the estimated glycolytic contribution during taekwondo combat simulation, but this did not result in any changes in performance, perceived exertion or parasympathetic reactivation.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>26539982</pmid><doi>10.1371/journal.pone.0142078</doi><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 1932-6203 |
| ispartof | PloS one, 2015-11, Vol.10 (11), p.e0142078-e0142078 |
| issn | 1932-6203 1932-6203 |
| language | eng |
| recordid | cdi_plos_journals_1730683387 |
| source | MEDLINE; DOAJ Directory of Open Access Journals; Public Library of Science (PLoS) Journals Open Access; EZB-FREE-00999 freely available EZB journals; PubMed Central; Free Full-Text Journals in Chemistry |
| subjects | Activation Adult Athletes Athletic Performance - physiology ATP Caffeine Caffeine - pharmacology Cellulose Cross-Over Studies Decay Double-Blind Method Energy Exercise Exercise - physiology Exercise Test - drug effects Glycolysis Glycolysis - drug effects Glycolysis - physiology Heart rate Heart Rate - drug effects Heart Rate - physiology Humans Ingestion Lactic acid Lactic Acid - metabolism Male Martial arts Martial Arts - physiology Metabolism Metabolites Oxygen Consumption - drug effects Oxygen Consumption - physiology Parasympathetic nervous system Parasympathetic Nervous System - drug effects Parasympathetic Nervous System - physiology Physical education Physical training Physiology Regression analysis Simulation Time constant Young Adult |
| title | Caffeine Ingestion Increases Estimated Glycolytic Metabolism during Taekwondo Combat Simulation but Does Not Improve Performance or Parasympathetic Reactivation |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-02T07%3A16%3A18IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_plos_&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Caffeine%20Ingestion%20Increases%20Estimated%20Glycolytic%20Metabolism%20during%20Taekwondo%20Combat%20Simulation%20but%20Does%20Not%20Improve%20Performance%20or%20Parasympathetic%20Reactivation&rft.jtitle=PloS%20one&rft.au=Lopes-Silva,%20Jo%C3%A3o%20Paulo&rft.date=2015-11-05&rft.volume=10&rft.issue=11&rft.spage=e0142078&rft.epage=e0142078&rft.pages=e0142078-e0142078&rft.issn=1932-6203&rft.eissn=1932-6203&rft_id=info:doi/10.1371/journal.pone.0142078&rft_dat=%3Cproquest_plos_%3E3858341411%3C/proquest_plos_%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=1730683387&rft_id=info:pmid/26539982&rft_doaj_id=oai_doaj_org_article_1446a3dfdfb343b09d8586155bb73d73&rfr_iscdi=true |